Hi Guys can you give me some advice please?

I have a 1995 Camry with 178k on the clock.  Every few days whilst
driving, the red warning light shaped like a battery and the yellow
light which appears to be the brake light warning come on
simultaneously for around 5 seconds and then they go out again, no
other symptoms are evident. Could this be the forerunner to a problem?
Also I find the remote key door lock/unlock is getting very sluggish,
sometimes I have to push the activator button on the key 5 or 6 times
before getting a result I have changed the battery in the key but that
has not helped. Any advice would be really appreciated.

Alex